Ratio of male to female writers at "general interest" magazines: 324 to 99 (i.e. 3:1). Ruth Davis Konigsberg, a deputy editor at Glamour, is taking names, at The New Yorker, The New York Times Magazine, The Atlantic Monthly, Harper's, and Vanity Fair.
These are the five biggies, the ones that can make or break you as a serious freelance writer, and they pay seriously as well. Personally I have pitched and been shot down at 3 of them, with various degrees of respectfulness.
What does worry me is the lack of an old girl's network. When I look at my personal network of journalistic colleagues and contacts, my own ratio of men to women is about 5 to 1. Many of the women are editors; many have been extremely helpful, even sisterly. Yet of the journalists I personally know around my age who are trying to get taken a little seriously and build a multifaceted career (as opposed to writing sex, fashion, celeb profiles), nearly all of them are men. This dates back to college when my close journalism pals were all boys.
Maybe I need to do a little Maureen Dowd-style friend-making.